Bosch 12-14-1-273-298 Ignition Control Unit for BMW E21 E30

The Bosch 12-14-1-273-298 is an OEM-quality ignition control unit (also known as an ignition control module or ICU) designed for classic BMW E21 and E30 chassis vehicles. This critical electronic component manages the timing and firing signals of the ignition system, ensuring reliable engine starts and smooth operation.

The ignition control unit serves as the brain of the ignition system, processing signals from the distributor and triggering the ignition coil to fire spark plugs at precisely the right moment. A failed or failing unit can result in hard starts, engine stalling, rough idle, or a complete no-start condition.

Key Features:

• OEM BMW part number: 12-14-1-273-298 (also referenced as 12141273298, 12.14.1.273.298)
• Manufactured by Bosch, the original equipment supplier for BMW ignition components
• Direct OEM replacement — no modifications required
• Restores proper ignition timing and engine performance
• Compatible with Bosch cross-reference numbers: 0-227-100-102, 0-227-100-110, 0-227-100-111, 0-227-100-112, 0-227-100-123, 0-227-100-148

Cross-Reference Part Numbers:

• BMW OEM: 12-14-1-273-298 / 12141273298 / 12-14-1-273-217 / 12-14-1-266-702 / 12-14-1-274-698
• Bosch: 0227100102, 0227100110, 0227100111, 0227100112, 0227100123, 0227100148, 1227010002, 1227010008

As an electrical component, this ignition control unit is a precision part. Always verify compatibility with your specific chassis and model year before installation.